Growing veg over old driveway?

Next to existing raised beds, I have a section of thin, old, tarmac driveway. I'm adding extra raised beds here, but unsure whether to remove the tarmac first? Is there any veg that would actually benefit from having the drive underneath? Horseradish, raspberries or other invasive fruit/veg, or just remove it?

 

I think I'd remove it for drainage reasons firstly, second I'm not sure if veg roots that are likely to penetrate the tarmac might take up some undesirable chemicals.

 

You need to at least break it up to allow drainage. Personally I would remove as much as I could.
I've got a flower bed on top of an old driveway but it is a concrete one, and I smashed it up before building the raised bed, for drainage. The flowers and shrubs grow well there and I'm sure some salad vegetables would grow there too, but I don't know about things like parsnips potatoes etc, it may not be deep enough, and I'm wondering the same thing about yours too.

 

I once tried growing on top of submerged slabs, nothing thrived there, so when digging a bit deeper to investigate, I found the slabs, probably an old shed base from a previous owner of the house. Once removed, things thrived.

 

Thank you everyone. Some good points to consider. The drive will go!